In socket direct mode, it's possible to bind any two (maybe four
in future) PCIe devices with IDs like xxxx:xx:xx.x and
yyyy:yy:yy.y. Bonding member interfaces are unnecessary to have
the same PCIe domain/bus/device ID anymore,
Kernel driver uses "system_image_guid" to identify if devices can
be bound together or not. Sysfs "phys_switch_id" is used to get
"system_image_guid" of each network interface.
OFED 5.4+ is required to support "phys_switch_id".
Signed-off-by: Rongwei Liu <rongw...@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viachesl...@nvidia.com>
---
doc/guides/nics/mlx5.rst | 4 +++
doc/guides/rel_notes/release_21_11.rst | 4 +++
drivers/net/mlx5/linux/mlx5_os.c | 43 ++++++++++++++++++++------
3 files changed, 42 insertions(+), 9 deletions(-)
diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index bae73f42d8..b58236e00a 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -464,6 +464,10 @@ Limitations
- In order to achieve best insertion rate, application should manage the
flows per lcore.
- Better to disable memory reclaim by setting ``reclaim_mem_mode`` to 0 to
accelerate the flow object allocation and release with cache.
+- Bonding under socket direct mode
+
+ - Needs OFED 5.4+.
+
Statistics
----------
diff --git a/doc/guides/rel_notes/release_21_11.rst
b/doc/guides/rel_notes/release_21_11.rst
index dfc2cbdeed..2a6cc765c2 100644
--- a/doc/guides/rel_notes/release_21_11.rst
+++ b/doc/guides/rel_notes/release_21_11.rst
@@ -106,6 +106,10 @@ New Features
* Added DES-CBC, AES-XCBC-MAC, AES-CMAC and non-HMAC algo support.
* Added PDCP short MAC-I support.
+* **Updated Mellanox mlx5 driver.**
+
+ * Added socket direct mode bonding support.
+
* **Updated NXP dpaa2_sec crypto PMD.**
* Added PDCP short MAC-I support.
diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index 3746057673..1d57b934fc 100644
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -2008,6 +2008,8 @@ mlx5_device_bond_pci_match(const struct ibv_device
*ibv_dev,
FILE *bond_file = NULL, *file;
int pf = -1;
int ret;
+ uint8_t cur_guid[32] = {0};
+ uint8_t guid[32] = {0};
/*
* Try to get master device name. If something goes
@@ -2022,6 +2024,8 @@ mlx5_device_bond_pci_match(const struct ibv_device
*ibv_dev,
np = mlx5_nl_portnum(nl_rdma, ibv_dev->name);
if (!np)
return -1;
+ if (mlx5_get_device_guid(pci_dev, cur_guid, sizeof(cur_guid)) < 0)
+ return -1;
/*
* The Master device might not be on the predefined
* port (not on port index 1, it is not garanted),
@@ -2050,6 +2054,7 @@ mlx5_device_bond_pci_match(const struct ibv_device
*ibv_dev,
char tmp_str[IF_NAMESIZE + 32];
struct rte_pci_addr pci_addr;
struct mlx5_switch_info info;
+ int ret;
/* Process slave interface names in the loop. */
snprintf(tmp_str, sizeof(tmp_str),
@@ -2080,15 +2085,6 @@ mlx5_device_bond_pci_match(const struct ibv_device
*ibv_dev,
tmp_str);
break;
}
- /* Match PCI address, allows BDF0+pfx or BDFx+pfx. */
- if (pci_dev->domain == pci_addr.domain &&
- pci_dev->bus == pci_addr.bus &&
- pci_dev->devid == pci_addr.devid &&
- ((pci_dev->function == 0 &&
- pci_dev->function + owner == pci_addr.function) ||
- (pci_dev->function == owner &&
- pci_addr.function == owner)))
- pf = info.port_name;
/* Get ifindex. */
snprintf(tmp_str, sizeof(tmp_str),
"/sys/class/net/%s/ifindex", ifname);
@@ -2105,6 +2101,30 @@ mlx5_device_bond_pci_match(const struct ibv_device
*ibv_dev,
bond_info->ports[info.port_name].pci_addr = pci_addr;
bond_info->ports[info.port_name].ifindex = ifindex;
bond_info->n_port++;
+ /*
+ * Under socket direct mode, bonding will use
+ * system_image_guid as identification.
+ * After OFED 5.4, guid is readable (ret >= 0) under sysfs.
+ * All bonding members should have the same guid even if driver
+ * is using PCIe BDF.
+ */
+ ret = mlx5_get_device_guid(&pci_addr, guid, sizeof(guid));
+ if (ret < 0)
+ break;
+ else if (ret > 0) {
+ if (!memcmp(guid, cur_guid, sizeof(guid)) &&
+ owner == info.port_name &&
+ (owner != 0 || (owner == 0 &&
+ !rte_pci_addr_cmp(pci_dev, &pci_addr))))
+ pf = info.port_name;
+ } else if (pci_dev->domain == pci_addr.domain &&
+ pci_dev->bus == pci_addr.bus &&
+ pci_dev->devid == pci_addr.devid &&
+ ((pci_dev->function == 0 &&
+ pci_dev->function + owner == pci_addr.function) ||
+ (pci_dev->function == owner &&
+ pci_addr.function == owner)))
+ pf = info.port_name;
}
if (pf >= 0) {
/* Get bond interface info */
@@ -2117,6 +2137,11 @@ mlx5_device_bond_pci_match(const struct ibv_device
*ibv_dev,
DRV_LOG(INFO, "PF device %u, bond device %u(%s)",
ifindex, bond_info->ifindex, bond_info->ifname);
}
+ if (owner == 0 && pf != 0) {
+ DRV_LOG(INFO, "PCIe instance %04x:%02x:%02x.%x isn't bonding
owner",
+ pci_dev->domain, pci_dev->bus, pci_dev->devid,
+ pci_dev->function);
+ }
return pf;
}
--
2.27.0
